# AD 79-10-16: Horizontal Stabilizer Modification

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 707-300 Series, 707-300B Series, 707-300C Series and 707-400 Series
- Effective: June 25, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3474
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/418DA5615EEEEDCE8625683900645CA5.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-10-16

## The airworthiness directive

79-10-16 BOEING: Amendment 39-3474. Applies to all Boeing 707-300/-400/-300B/-300C airplanes noted in Boeing Service Bulletin 3356: No later than December 31, 1980, modify the horizontal stabilizer in accordance with the terminating action specified in Boeing Service Bulletin 3356, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective June 25, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 6 (6 by airframe model, 0 by engine model)
- Makers: Boeing 6

Models with the most aircraft:

- [Boeing 707-338C](https://openairdocs.org/model/boeing-707-338c): 2 aircraft (airframe model)
- [Boeing 707-368C](https://openairdocs.org/model/boeing-707-368c): 1 aircraft (airframe model)
- [Boeing 707-321B](https://openairdocs.org/model/boeing-707-321b): 1 aircraft (airframe model)
- [Boeing 707-323B](https://openairdocs.org/model/boeing-707-323b): 1 aircraft (airframe model)
- [Boeing 707-351B](https://openairdocs.org/model/boeing-707-351b): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/79-10-16/models.md
Every aircraft: https://openairdocs.org/ad/79-10-16/aircraft.md

Its text cites no advisory circulars or STCs.

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